Improvement in tube-gears



'NITED STATES PATENT OFFICE.

W. P. OOREY, OF AMSTERDAM, NEW YORK, ASSIGNOR TO lHIMSELF AND D. P. OOREY, OF SAME PLAGE.

l IMPROVEMENT IN TUBE-GEARS.

Specification forming part of Letters Patent No. 59,504, dated November 6,' 1866.

To all whom it may concern:

Be it known that I, W. P. CoREY, of Amsterdam, in the county of Montgomery and State of New York, have invented a new and Improved Link and Valve Motion; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming apart of this specification, in which- Figure l represents a sectional side elevation of this invention. Fig. 2 is a sectional plan or top view of the same.

Similar letters of reference indicate like parts.

This invention consists in the arrangement of a single eccentric in combination with an oscillating link and block, which connects by a suitable rod with the rock-shaft and valve of a steam-engine in such a manner that a correct and accurate working of the valve can be effected with only one eccentric for each cylinder, and the engine can be reversed with ease and facility.

The link a, which I use in carrying out my invention, is the same as those now in use; only, instead of having one eccentric connected at the upper and one at the lower end of it, the link is supported at or nea-r the center by the pin c, on which it oscillates. Said link is so shaped that it forms part of a circle, the center of which is at the center of the lower arm, d, of the rock-shaft c.

The eccentric f connects with the link at its lower end, as shown in Fig. l, and if the eccentric revolves, said lower end is compelled to swing in one direction, While the upper end swings just as far in the opposite direction.

The connection between the link and the lower arm of the rock-shaft is effected by a rod, z', one end of which is connected with the arm d, and the other to the pin j in the block k, which slides up and down in the link, for the purpose of reversing the motion of the engine, instead of raising and lowering the link, as now used.

The motion of said block is effected by the reversing-lever Z, which is applied in any convenient manner.

By moving the block k toward the pivot or fulcrum of the link, the throw of the valve, and consequently the quantity of steam admitted to the cylinder, are reduced; and if the block is moved just over the fulcrum of the link, the valve stops and no steam is admittedl to the cylinder.

By this improvement the construction of an engine is materially simplified, the friction is reduced, and an engine is obtained which is more durable, less complicated, and cheaper in the end than engines constructed in the usual manner.

My link-motion may also be combined with the governor of a stationary engine, the governor being connected to the reversing-lever. In this case the operation is as follows: Suppose the lever is set so as to give a threequarter stroke when in proper speed. Now if, by throwing on heavy machinery or from some other cause, the speed becomes slow, the governor will drop and throw the lever ahead, so as to give more steam by increasing the stroke of the valve; and if, from any cause, the speed should be increased, the governor will rise and throw the lever back to threequarter stroke, or even less, and perhaps reverse the engine for an instant, until it (the engine) has regained its proper speed.

What I claim as new, and desire to secure by Letters Patent, is-

The arrangement of the link a, supportingi pin c, rod t', and sliding block k, arm d, rockshaft e, and the eccentric f, relatively to each other and with the valve, substantially in the manner and for thepurpose herein represented and described.

wLTs P. ooREY.

Witnesses J oHN STUART, S. A. LEwIs. 

